Hi guys

We wanted to reuse metrics computation for example alves ratio (shown below) but for metrics imported from different tools like understand or sonar.

calculateAlvesRatio “note that we do not know if this definition is correct but we want to reuse it" ^ self numberOfLinesOfCode / self lcom3

We wanted to avoid to reify all the metrics to avoid to blow memory (yes Cyril we the researchers are not totally dummy :).

Here is a solution: double dispatch :) So tell us.

FAMIXClass >> calculateAlvesLCOMRatio ^ (self family numberOfLinesOfCodeForClass: self) / (self family lcomForClass: self)

MooseFamily >> lcomForClass: aClass ^ aClass lcom3

MooseFamily >> numberOfLinesOfCodeForClass: aClass ^ aClass numberOfLinesOfCode

UnderstandFamily >> lcomForClass: aClass ^ aClass understand_LCOM

UnderstandFamily >> numberOfLinesOfCodeForClass: aClass ^ aClass understand_LoC

testClassLinesOfCodeWithMooseFamily "self nodeClass propertyNamed: #family put: FamixFamily uniqueInstance."

self nodeClass familyClass: MooseFamily. self assert: self nodeClass numberOfLinesOfCode equals: 58. self assert: self nodeClass lcom3 equals: 10 / 11. self assert: self nodeClass calculateAlvesLCOMRatio equals: 319 / 5

testClassLinesOfCodeWithUnderstandFamily self nodeClass familyClass: UnderstandFamily. self nodeClass propertyNamed: #understand_LoC put: 85; propertyNamed: #understand_LCOM put: 11. self assert: self nodeClass calculateAlvesLCOMRatio equals: 85 / 11

Comments are welcome and code available at:

MCSmalltalkhubRepository owner: 'Moose' project: 'Moose' user: '' password: ‘'

Stef

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